I Wanda is a Nicholson 40 PH. We have lost our bow chock and are trying to find a replacement. The same bow chocks are found on the Nick 38 and Nauticats. The measurements are 8.5 inches long by 2 inches wide, and are secured to the deck by 4 fasteners. Please let me know if you know a supplier or if you have informations about used ones.